/Engine/Source/Runtime/Core/Public/Misc/ConfigCacheIni.h
Process the '+' and '.' commands, takingf into account ArrayOfStruct unique keys
void HandleAddCommand ( [FName](API\Runtime\Core\UObject\FName) Key, [FString](API\Runtime\Core\Containers\FString) && Value, bool bAppendValueIfNotArrayOfStructsKeyUsed )